Abstract:
PROBLEM TO BE SOLVED: To provide a pierced electron gun which is made easy to assemble by reducing the number of parts while suppressing increase of consumed power and increase of perveance in a heater. SOLUTION: The electron gun equipped with a Wehnelt electrode for focusing an electron beam has a structure having a negative electrode emitting electrons, a heater cap having a built-in heater giving the negative electrode thermal energy for emitting the electrons, a retainer for fitting a peripheral edge of the negative electrode to the heater cap to provide and fix the negative electrode on to the heater cap, a Wehnelt electrode part formed in a shape that a mean angle of the surface conforms to a piercing angle, and a Wehnelt support, in which at least 3 heater cap supporting members for supporting and fixing the heater cap in such a manner that an electron emitting surface of the negative electrode and an opening provided in the Wehnelt electrode part are located at positions satisfying a prescribed perveance have been integrally formed. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a technology which is advantageous for shortening the time required for replacing an electrode of an electron gun.SOLUTION: An electron beam lithography apparatus for drawing a pattern on a substrate by electron beams emitted from an electron gun includes: an adjustment chamber for adjusting a standby electrode constituting the electron gun as a standby of an electrode; and a drive mechanism in which the used electrode is detached from the electron gun and the standby electrode adjusted in the adjustment chamber is incorporated into the electron gun. The supply of electric power to the standby electrode is included in adjustment of the standby electrode.